adds collision to spawned monsters, moves player position 3 units back

scripts/monster.gd

@@ -1,13 +1,53 @@
 class_name Monster
-extends Node3D
+extends CharacterBody3D
 
-@export var monster_stats: MonsterStats
+@export var stats: MonsterStats
+
+var spawn_point: Vector3 = Vector3(0, 0, 0)
+
+# DEBUG MOVEMENT
+@onready var time: float = 16.0
+@onready var frequency: float = 1.0
+@onready var amplitude: float = 0.5
+
+var in_battle: bool = false
 
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
-	var model_instance = monster_stats.model.instantiate()
+	var model_instance = stats.model.instantiate()
+	frequency = randf_range(1.0, 4.0)
+	amplitude = randf_range(1.0, 6.0)
+	spawn_point = position
 	add_child(model_instance)
 
-# Called every frame. 'delta' is the elapsed time since the previous frame.
-func _process(delta: float) -> void:
-	pass
+func _physics_process(delta: float) -> void:
+	if in_battle:
+		velocity = Vector3.ZERO
+		return
+
+	time += delta
+	var x_movement = sin(time * frequency) * amplitude
+	var z_movement = cos(time * frequency) * amplitude
+	velocity = Vector3(x_movement, 0, z_movement)
+	
+	# if move_and_slide reports collisions
+	if move_and_slide():
+		var collision = get_slide_collision(0)
+		var collider = collision.get_collider()
+		
+		# if the monster collided with the player...
+		if collider.name == "Player":
+			velocity = Vector3.ZERO
+			in_battle = true
+			
+			# calculate players new position
+			# from the camera 3 units backwards
+			var camera = collider.find_child("Camera3D")
+			
+			# local z axis of the camera
+			var local_z = camera.global_transform.basis.z
+			
+			var new_player_position = camera.global_transform.origin + local_z * 3
+			
+			print(camera.global_transform.origin, new_player_position)
+			collider.start_battle(new_player_position)